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<tr class="t-nv-h1"><td colspan="5"> 成员类型</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="openmode.html" title="cpp/io/ios base/openmode"><span class="t-lines"><span>ios_base::openmode</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="fmtflags.html" title="cpp/io/ios base/fmtflags"><span class="t-lines"><span>ios_base::fmtflags</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>ios_base::iostate</span></span></strong></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="seekdir.html" title="cpp/io/ios base/seekdir"><span class="t-lines"><span>ios_base::seekdir</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="event.html" title="cpp/io/ios base/event"><span class="t-lines"><span>ios_base::event</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="event_callback.html" title="cpp/io/ios base/event callback"><span class="t-lines"><span>ios_base::event_callback</span></span></a></div></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">typedef</span> <span class="coMULTI">/*implementation defined*/</span> iostate<span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td class="t-dcl-nopad">  </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">static</span> <span class="kw4">constexpr</span> iostate goodbit <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td class="t-dcl-nopad">  </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">static</span> <span class="kw4">constexpr</span> iostate badbit <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span><br>
<p><span class="kw4">static</span> <span class="kw4">constexpr</span> iostate failbit <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span><br>
</p>
<span class="kw4">static</span> <span class="kw4">constexpr</span> iostate eofbit <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td class="t-dcl-nopad">  </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>指定流状态标志。它是<a href="../../named_req/BitmaskType.html" title="cpp/named req/BitmaskType"><i>位掩码类型</i> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(BitmaskType)</span> </a>，定义下列常量：
</p>
<table class="t-dsc-begin">

<tr class="t-dsc-sep">
<td colspan="2">  
</td></tr>
<tr class="t-dsc-hitem">
<td>  常量
</td>
<td>  解释
</td></tr>


<tr class="t-dsc">
<td>  <strong class="selflink"><tt>goodbit</tt></strong>
</td>
<td>  无错误
</td></tr>

<tr class="t-dsc">
<td>  <strong class="selflink"><tt>badbit</tt></strong>
</td>
<td>  不可恢复的流错误
</td></tr>

<tr class="t-dsc">
<td>  <strong class="selflink"><tt>failbit</tt></strong>
</td>
<td>  输入/输出操作失败（格式化或提取错误）
</td></tr>

<tr class="t-dsc">
<td>  <strong class="selflink"><tt>eofbit</tt></strong>
</td>
<td>  关联的输出序列已抵达文件尾
</td></tr>
</table>
<h4><span class="mw-headline" id="eofbit">eofbit</span></h4>
<p>下列标准库函数设置 eofbit ：
</p>
<ul><li> string 输入函数 <span class="t-lc"><a href="../../string/basic_string/getline.html" title="cpp/string/basic string/getline">std::getline</a></span> ，若它以抵达流结尾，而非抵达指定的终止字符完成。
</li><li> <a href="../basic_istream/operator_gtgt.html" title="cpp/io/basic istream/operator gtgt"><tt>basic_istream::operator&gt;&gt;</tt></a> 的数值输入重载，若在 <a href="../../locale/num_get/get.html" title="cpp/locale/num get/get"><tt>num_get::get</tt></a> 处理的阶段 2 ，读取下个字符时遇到流结尾。取决于分析状态，可能或可能不同时设置 <code>failbit</code> ：例如 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span> n<span class="sy4">;</span> istringstream buf<span class="br0">(</span><span class="st0">"1"</span><span class="br0">)</span><span class="sy4">;</span> buf <span class="sy1">&gt;&gt;</span> n<span class="sy4">;</span></span></span> 设置 <code>eofbit</code> ，但不设置 <code>failbit</code> ：成功分析整数 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">1</span></span></span> 并存储之于 <code>n</code> 。另一方面， <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> b<span class="sy4">;</span> istringstream buf<span class="br0">(</span><span class="st0">"tr"</span><span class="br0">)</span><span class="sy4">;</span> buf <span class="sy1">&gt;&gt;</span> boolalpha <span class="sy1">&gt;&gt;</span> b<span class="sy4">;</span></span></span> 一同设置 <code>eofbit</code> 和 <code>failbit</code> ：无足够的字符完成布尔 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> 的分析。
</li><li> <a href="../basic_istream/operator_gtgt2.html" title="cpp/io/basic istream/operator gtgt2"><tt>operator&gt;&gt;<span class="t-dsc-small">std::basic_istream</span></tt></a> 的字符释出重载，若在释出字符数量上的限制（若存在）前抵达流结尾。
</li><li> <span class="t-lc"><a href="../manip/get_time.html" title="cpp/io/manip/get time">std::get_time</a></span> I/O 操纵符和任何 <span class="t-lc"><a href="../../locale/time_get.html" title="cpp/locale/time get">std::time_get</a></span> 分析函数： <a href="../../locale/time_get/get.html" title="cpp/locale/time get/get"><tt>time_get::get</tt></a> 、 <a href="../../locale/time_get/get_time.html" title="cpp/locale/time get/get time"><tt>time_get::get_time</tt></a> 、 <a href="../../locale/time_get/get_date.html" title="cpp/locale/time get/get date"><tt>time_get::get_date</tt></a> 等，若在分析期待的被处理日期/时间值所需的最末字符前抵达流结尾。
</li><li> <span class="t-lc"><a href="../manip/get_money.html" title="cpp/io/manip/get money">std::get_money</a></span> I/O 操纵符和 <a href="../../locale/money_get/get.html" title="cpp/locale/money get/get"><tt>money_get::get</tt></a> 函数，若在分析期待的被处理货币值所需的最末字符前抵达流结尾。
</li><li> <a href="../basic_istream/sentry.html" title="cpp/io/basic istream/sentry"><tt>basic_istream::sentry</tt></a> 构造函数，在每个有格式输入函数的起始执行：除非未设置 <code>skipws</code> （例如通过发布 <span class="t-lc"><a href="../manip/skipws.html" title="cpp/io/manip/skipws">std::noskipws</a></span> ），否则 sentry 会读取并舍弃前导空白字符。若在此操作中抵达流结尾，则一同设置 <code>eofbit</code> 和 <code>failbit</code> ，并且不发生输入。
</li><li> I/O 操纵符 <span class="t-lc"><a href="../manip/ws.html" title="cpp/io/manip/ws">std::ws</a></span> ，若它在消耗空白符时抵达流结尾（但不同于有格式输入 sentry ，此情况下它不设置 <code>failbit</code> ）
</li><li> 无格式输入函数 <a href="../basic_istream/read.html" title="cpp/io/basic istream/read"><tt>basic_istream::read</tt></a> 、 <a href="../basic_istream/get.html" title="cpp/io/basic istream/get"><tt>basic_istream::get</tt></a> 、 <a href="../basic_istream/peek.html" title="cpp/io/basic istream/peek"><tt>basic_istream::peek</tt></a> 和 <a href="../basic_istream/getline.html" title="cpp/io/basic istream/getline"><tt>basic_istream::getline</tt></a> 在抵达流尾时。
</li><li> 舍弃输入函数 <a href="../basic_istream/ignore.html" title="cpp/io/basic istream/ignore"><tt>basic_istream::ignore</tt></a> ，在抵达指定的分隔字符前抵达流结尾时。
</li><li> 立即输入函数 <a href="../basic_istream/readsome.html" title="cpp/io/basic istream/readsome"><tt>basic_istream::readsome</tt></a> ，若 <a href="../basic_streambuf/in_avail.html" title="cpp/io/basic streambuf/in avail"><tt>basic_streambuf::in_avail</tt></a> 返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">-</span><span class="nu0">1</span></span></span>
</li></ul>
<p>下列函数作为副效应清除 <code>eofbit</code> ：
</p>
<ul><li> <a href="../basic_istream/putback.html" title="cpp/io/basic istream/putback"><tt>basic_istream::putback</tt></a>
</li><li> <a href="../basic_istream/unget.html" title="cpp/io/basic istream/unget"><tt>basic_istream::unget</tt></a>
</li><li> <a href="../basic_istream/seekg.html" title="cpp/io/basic istream/seekg"><tt>basic_istream::seekg</tt></a>
</li></ul>
<p>注意在几乎所有情况下，若设置 eofbit ，则一同设置 failbit 。
</p>
<h4><span class="mw-headline" id="failbit">failbit</span></h4>
<p>下列标准库函数设置 failbit ：
</p>
<ul><li> <a href="../basic_istream/sentry.html" title="cpp/io/basic istream/sentry"><tt>basic_istream::sentry</tt></a> 构造函数，在每个输入函数起始执行，若流上已设置 <code>eofbit</code> 或 <code>badbit</code> ，或若在消耗前导空白时遇到流结尾。
</li><li> <a href="../basic_ostream/sentry.html" title="cpp/io/basic ostream/sentry"><tt>basic_ostream::sentry</tt></a> 构造函数，在每个输出函数起始执行，在实现定义的条件下。
</li><li> <a href="../../string/basic_string/operator_ltltgtgt.html" title="cpp/string/basic string/operator ltltgtgt"><tt>operator&gt;&gt;<span class="t-dsc-small">(std::basic_string&lt;&gt;)</span></tt></a> ，若函数未从输入流释出字符。
</li><li> <a href="../../numeric/complex/operator_ltltgtgt.html" title="cpp/numeric/complex/operator ltltgtgt"><tt>operator&gt;&gt;<span class="t-dsc-small">(std::complex&lt;&gt;)</span></tt></a> ，若函数无法释出合法的复数。
</li><li> <a href="../basic_istream/operator_gtgt2.html" title="cpp/io/basic istream/operator gtgt2"><tt>operator&gt;&gt;</tt></a> 的字符数组和单字符重载，若它们无法释出字符。
</li><li> <a href="../basic_istream/operator_gtgt.html" title="cpp/io/basic istream/operator gtgt"><tt>basic_istream::operator&gt;&gt;</tt></a> 的 streambuf 重载，若 streambuf 参数为空指针或若没有插入字符到 streambuf 。
</li><li> <a href="../basic_ostream/operator_ltlt.html" title="cpp/io/basic ostream/operator ltlt"><tt>basic_ostream::operator&lt;&lt;</tt></a> 的 streambuf 重载，若函数未插入字符。
</li><li> <a href="../../utility/bitset/operator_ltltgtgt2.html" title="cpp/utility/bitset/operator ltltgtgt2"><tt>operator&gt;&gt;<span class="t-dsc-small">(std::bitset&lt;&gt;)</span></tt></a> ，若函数未从输出流释出字符。
</li><li> <span class="t-lc"><a href="../../string/basic_string/getline.html" title="cpp/string/basic string/getline">std::getline</a></span> ，若函数未释出字符，或若它要从输入流释出 <a href="../../string/basic_string/max_size.html" title="cpp/string/basic string/max size"><tt>basic_string::max_size</tt></a> 个字符。
</li><li> <a href="../basic_istream/operator_gtgt.html" title="cpp/io/basic istream/operator gtgt"><tt>basic_istream::operator&gt;&gt;</tt></a> 的数值、指针和布尔输入重载（技术上是它们调用的 <a href="../../locale/num_get/get.html" title="cpp/locale/num get/get"><tt>num_get::get</tt></a> 的重载），若输入不能分析为合法值，或若分析出的值不适合于目标类型。
</li><li> 时间输入操纵符 <span class="t-lc"><a href="../manip/get_time.html" title="cpp/io/manip/get time">std::get_time</a></span> （技术上是其所调用的 <a href="../../locale/time_get/get.html" title="cpp/locale/time get/get"><tt>time_get::get</tt></a> ），若输入不能按照给定的格式字符串，无歧义地分析为时间值。
</li><li> 货币输入操纵符 <span class="t-lc"><a href="../manip/get_money.html" title="cpp/io/manip/get money">std::get_money</a></span> （技术上是其所调用的 <a href="../../locale/money_get/get.html" title="cpp/locale/money get/get"><tt>money_get::get</tt></a> ），若输入不能按照本地环境规则无歧义地分析为货币值。
</li><li> 所有<a href="../../named_req/RandomNumberEngine.html" title="cpp/named req/RandomNumberEngine"><i>随机数引擎</i> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(RandomNumberEngine)</span> </a>的释出函数，若遇到错误输入。
</li><li> 所有<a href="../../named_req/RandomNumberDistribution.html" title="cpp/named req/RandomNumberDistribution"><i>随机数分布</i> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(RandomNumberDistribution)</span> </a>的释出函数，若遇到错误输入。
</li><li> 无格式输入函数 <a href="../basic_istream/get.html" title="cpp/io/basic istream/get"><tt>basic_istream::get</tt></a> ，若它们无法释出任何字符。
</li><li> <a href="../basic_istream/getline.html" title="cpp/io/basic istream/getline"><tt>basic_istream::getline</tt></a> ，若它未释出字符，若它填充给定的缓冲区而未遇到分隔符，或若提供的缓冲区大小小于 1 。
</li><li> <a href="../basic_istream/read.html" title="cpp/io/basic istream/read"><tt>basic_istream::read</tt></a> ，若在能释出所有请求的字符前，输入流上出现文件尾条件。
</li><li> <a href="../basic_istream/seekg.html" title="cpp/io/basic istream/seekg"><tt>basic_istream::seekg</tt></a> 在失败时。
</li><li> <a href="../basic_ostream/tellp.html" title="cpp/io/basic ostream/tellp"><tt>basic_ostream::tellp</tt></a> 在失败时。
</li><li> <span class="t-lc"><a href="../basic_fstream.html" title="cpp/io/basic fstream">std::basic_fstream</a></span> 、 <span class="t-lc"><a href="../basic_ifstream.html" title="cpp/io/basic ifstream">std::basic_ifstream</a></span> 和 <span class="t-lc"><a href="../basic_ofstream.html" title="cpp/io/basic ofstream">std::basic_ofstream</a></span> 接收文件名参数的构造函数，若无法打开文件。
</li><li> <a href="../basic_fstream/open.html" title="cpp/io/basic fstream/open"><tt>basic_fstream::open</tt></a> 、 <a href="../basic_ifstream/open.html" title="cpp/io/basic ifstream/open"><tt>basic_ifstream::open</tt></a> 和 <a href="../basic_ofstream/open.html" title="cpp/io/basic ofstream/open"><tt>basic_ofstream::open</tt></a> ，若无法打开文件。
</li><li> <a href="../basic_fstream/close.html" title="cpp/io/basic fstream/close"><tt>basic_fstream::close</tt></a> 、 <a href="../basic_ifstream/close.html" title="cpp/io/basic ifstream/close"><tt>basic_ifstream::close</tt></a> 和 <a href="../basic_ofstream/close.html" title="cpp/io/basic ofstream/close"><tt>basic_ofstream::close</tt></a> ，若无法关闭文件。
</li></ul>
<h4><span class="mw-headline" id="badbit">badbit</span></h4>
<p>下列标准库函数设置 badbit ：
</p>
<ul><li> <a href="../basic_ostream/put.html" title="cpp/io/basic ostream/put"><tt>basic_ostream::put</tt></a> ，若它因任何原因无法插入元素到输出流。
</li><li> <a href="../basic_ostream/write.html" title="cpp/io/basic ostream/write"><tt>basic_ostream::write</tt></a> ，若它因任何原因无法插入元素到输出流。
</li><li> 有格式输出函数 <a href="../basic_ostream/operator_ltlt.html" title="cpp/io/basic ostream/operator ltlt">operator&lt;&lt;</a> 、 <span class="t-lc"><a href="../manip/put_money.html" title="cpp/io/manip/put money">std::put_money</a></span> 和 <span class="t-lc"><a href="../manip/put_time.html" title="cpp/io/manip/put time">std::put_time</a></span> ，若它们在完成输出前遇到输出流的结尾。
</li><li> <a href="../basic_ios/init.html" title="cpp/io/basic ios/init"><tt>basic_ios::init</tt></a> ，在以对于 <code>rdbuf()</code> 的空指针调用以初始化流时。
</li><li> <a href="../basic_istream/putback.html" title="cpp/io/basic istream/putback"><tt>basic_istream::putback</tt></a> 和 <a href="../basic_istream/unget.html" title="cpp/io/basic istream/unget"><tt>basic_istream::unget</tt></a> ，在以空的 <code>rdbuf()</code> 在流上调用时
</li><li> <a href="../basic_ostream/operator_ltlt.html" title="cpp/io/basic ostream/operator ltlt"><tt>basic_ostream::operator&lt;&lt;<span class="t-dsc-small">(basic_streambuf*)</span></tt></a> ，传递空指针为参数时。
</li><li> <a href="../basic_istream/putback.html" title="cpp/io/basic istream/putback"><tt>basic_istream::putback</tt></a> 和 <a href="../basic_istream/unget.html" title="cpp/io/basic istream/unget"><tt>basic_istream::unget</tt></a> ，若 
</li></ul>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp">rdbuf<span class="br0">(</span><span class="br0">)</span><span class="sy2">-</span><span class="sy1">&gt;</span>sputbackc<span class="br0">(</span><span class="br0">)</span></span></span> 或 <span class="t-c"><span class="mw-geshi cpp source-cpp">rdbuf<span class="br0">(</span><span class="br0">)</span><span class="sy2">-</span><span class="sy1">&gt;</span>sungetc<span class="br0">(</span><span class="br0">)</span></span></span> 返回 <span class="t-c"><span class="mw-geshi cpp source-cpp">traits<span class="sy4">::</span><span class="me2">eof</span><span class="br0">(</span><span class="br0">)</span></span></span> 。
</p>
<ul><li> <a href="https://zh.cppreference.com/w/cpp/io/basic_istream/sync" title="cpp/io/basic istream/sync"><tt>basic_istream::sync</tt></a> 、 <a href="../basic_ostream/flush.html" title="cpp/io/basic ostream/flush"><tt>basic_ostream::flush</tt></a> 和 <code>unitbuf</code> 输出流上的每个输出函数，若 <span class="t-c"><span class="mw-geshi cpp source-cpp">rdbuf<span class="br0">(</span><span class="br0">)</span><span class="sy2">-</span><span class="sy1">&gt;</span>pubsync<span class="br0">(</span><span class="br0">)</span></span></span> 返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">-</span><span class="nu0">1</span></span></span> 。
</li><li> 每个流 I/O 函数，若任何关联流缓冲的成员函数（如 sbumpc() 、 xsputn() 、 sgetc() 、 overflow() 等）抛出异常。
</li><li> <a href="iword.html" title="cpp/io/ios base/iword"><tt>ios_base::iword</tt></a> 和 <a href="pword.html" title="cpp/io/ios base/pword"><tt>ios_base::pword</tt></a> 在失败时（例如无法分配内存）。
</li></ul>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style=""><tr><td class="mbox-empty-cell"></td><td class="mbox-text" style="">本节未完成<br>原因：暂无示例 </td></tr></table>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
<p>下表显示 <code>basic_ios</code> 访问器（ <a href="../basic_ios/good.html" title="cpp/io/basic ios/good"><tt>good()</tt></a>、 <a href="../basic_ios/fail.html" title="cpp/io/basic ios/fail"><tt>fail()</tt></a> 等）对于 <strong class="selflink"><tt>ios_base::iostate</tt></strong> 标志的所有可能组合的值：
</p>
<table class="wikitable" style="font-size:85%; text-align:center;">

<tr>
<td colspan="3"> <strong class="selflink"><tt>ios_base::iostate</tt></strong> 标志
</td>
<td colspan="6"> <code>basic_ios</code> 访问器
</td></tr>
<tr>
<td> eofbit
</td>
<td> failbit
</td>
<td> badbit
</td>
<td> <a href="../basic_ios/good.html" title="cpp/io/basic ios/good"><tt>good()</tt></a>
</td>
<td> <a href="../basic_ios/fail.html" title="cpp/io/basic ios/fail"><tt>fail()</tt></a>
</td>
<td> <a href="../basic_ios/bad.html" title="cpp/io/basic ios/bad"><tt>bad()</tt></a>
</td>
<td> <a href="../basic_ios/eof.html" title="cpp/io/basic ios/eof"><tt>eof()</tt></a>
</td>
<td> <a href="../basic_ios/operator_bool.html" title="cpp/io/basic ios/operator bool"><tt>operator bool</tt></a>
</td>
<td> <a href="../basic_ios/operator%21.html" title="cpp/io/basic ios/operator!"><tt>operator!</tt></a>
</td></tr>
<tr>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td></tr>
<tr>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td></tr>
<tr>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td></tr>
<tr>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td></tr>
<tr>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td></tr>
<tr>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td></tr>
<tr>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td></tr>
<tr>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> false
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">true
</td></tr></table>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../basic_ios/rdstate.html" title="cpp/io/basic ios/rdstate"> <span class="t-lines"><span>rdstate</span></span></a></div></div>
</td>
<td>  返回状态标志 <br> <span class="t-mark">(<code>std::basic_ios&lt;CharT,Traits&gt;</code> 的公开成员函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../basic_ios/setstate.html" title="cpp/io/basic ios/setstate"> <span class="t-lines"><span>setstate</span></span></a></div></div>
</td>
<td>  设置状态标志 <br> <span class="t-mark">(<code>std::basic_ios&lt;CharT,Traits&gt;</code> 的公开成员函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../basic_ios/clear.html" title="cpp/io/basic ios/clear"> <span class="t-lines"><span>clear</span></span></a></div></div>
</td>
<td>  修改状态标志 <br> <span class="t-mark">(<code>std::basic_ios&lt;CharT,Traits&gt;</code> 的公开成员函数)</span> </td></tr>
</table>

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